Pentagon End Mill & Ball Nose Re-Sharpener
This ball nose end mill re-sharpener is a specialized grinding machine designed for the precise sharpening of cutting tools used in 3D contour milling and mold making. The Φ6–Φ20 mm grinding range accommodates a full set of metric collets. • Adjusts point angles from 0° to 3° • Operates on AC 220V/250W at 4400 RPM • Ships with SDC wheel, CBN available • Measures 60 × 30 × 37 cm for bench mounting
See it in action
Specifications
For: MR-X8R Suitable size 6-20 mm- Model No.
- MR-X8R
- Collets Included
- Φ6, Φ8, Φ10, Φ12, Φ14, Φ16, Φ18, Φ20 mm
- Point Angle
- 0° – 3°
- Grinding Range
- Φ6 mm – Φ20 mm
- Flute Compatibility
- Ball nose end mills
- Power
- AC 220V/250W
- Grinding Wheel
- SDC (standard), CBN (optional)
- Speed
- 4400 RPM
- Dimensions
- 60 × 30 × 37 cm
- Weight
- 40 kg
Description
PENTAGON END MILL Ball Nose re-SHARPENER MR-X8R suitable to grind 6-20 mm size end mills and Ball Nose with Grinding wheel, Standard size : R0.5, R1 with Six collets: 6, 8, 10, 12, 14, 16,
18, 20 with 3 collets chucks 2-4 flutes ×1 piece, 3-6 flutes ×1 piece
Features
1.Accommodates ball nose end mills with diameters ranging from Φ6 mm to Φ20 mm, making it suitable for a wide range of tool sizes.
2.Equipped with a 220V/250W DC motor that drives the grinding wheel at 4,400 RPM, ensuring efficient material removal and a fine surface finish.
3.Allows for point angle adjustments between 0° and 3°, enabling the sharpening of both the end face and the cutting edges of the end mill.
4.Comes standard with SDC (Silicon Diamond) grinding wheels, suitable for sharpening carbide tools. An optional CBN (Cubic Boron Nitride) wheel is available for HSS tools.
5.Includes eight collets: Φ6, Φ8, Φ10, Φ12, Φ14, Φ16, Φ18, Φ20 mm, providing versatility for various tool sizes.
6.With dimensions of 60 × 30 × 37 cm and a weight of approximately 40 kg, the MR-X8R is designed for easy integration into small workspaces.
7.Features a user-friendly interface that requires minimal training, making it accessible for operators without extensive grinding experience.
Accessories
Standard Accessories Included
- Grinding wheel : SDC wheel for endmill and ball nose
- Collet Set : Dia , 6, 8, 10, 12, 14, 16, 18, 20mm
Optional Accessories (Extra)
- Face grinding wheel :CBN (for HSS)
More questions buyers ask
What is an end mill re-sharpener?
An end mill re-sharpener is a specialized grinding machine designed to restore the cutting edges of worn-out end mills and ball nose cutters, extending their tool life.
What size range does the Pentagon MR-X8R support?
The Pentagon MR-X8R supports end mills and ball nose cutters with diameters ranging from 6 mm to 20 mm.
Can this machine sharpen carbide tools?
Yes, it comes standard with an SDC (Silicon Diamond) grinding wheel, which is specifically designed for sharpening carbide tools.
Is a CBN wheel included for HSS tools?
No, the CBN wheel for HSS tools is an optional accessory and can be purchased separately.
What power supply is required?
The machine operates on a standard AC 220V power supply with a 250W motor.
What is the grinding speed of the MR-X8R?
The grinding wheel operates at a speed of 4,400 RPM for efficient material removal.
How many collets are included?
It includes eight collets covering sizes from 6 mm to 20 mm (6, 8, 10, 12, 14, 16, 18, 20 mm).
Is this machine suitable for small workshops?
Yes, with dimensions of 60 x 30 x 37 cm and a weight of 40 kg, it is compact and ideal for tool rooms and small workshops.
Does it require professional training to operate?
The machine features a user-friendly interface designed for easy operation, requiring minimal training.
What is the warranty on Pentagon machines?
Pentagon provides standard manufacturer warranty support. Please contact their authorized service channels for specific terms and claims.
Who should choose the Pentagon MR-X8R?
The MR-X8R is ideal for machine shops and tool rooms that frequently use 6-20mm end mills and want to reduce tooling costs by re-sharpening in-house.
How does this compare to manual grinding?
Compared to manual grinding, the MR-X8R offers significantly higher precision, consistent angles, and faster turnaround times for tool maintenance.
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Full description
This ball nose end mill re-sharpener is a specialized grinding machine designed for the precise sharpening of cutting tools used in 3D contour milling and mold making. The Φ6–Φ20 mm grinding range accommodates a full set of metric collets. • Adjusts point angles from 0° to 3° • Operates on AC 220V/250W at 4400 RPM • Ships with SDC wheel, CBN available • Measures 60 × 30 × 37 cm for bench mounting